Plate assembling and retaining jack



Sept. 12, 1944. F. MARTINI PLATE ASSEMBLING AND RETAINING JACK Filed A ri1 2,'194s 2 sheets-sheet 1 p 1 1944- F. MARTINI 2,358,180

PLATE ASSEMBLING AND RETAINING JACK Filed April 2, 1943 2 Sheets-Sheet 2 W /9 IIIIIIIIIIIIIIIIII Inventor gz w ill Patented Sept. 12, 1944 UNITED STATES PATENT OFFICE r I r I; i ;-2 ,'358,180 PLATE Assn Lr' G ANl) RETAINING JACK Ferruccio ltiartini, New York, N. Y.

Application nn 2, 1943, Serial No. 481,631 (01. 113-99) v p I r 3 Claims.-

' This invention relates to a novel and improved jack which is expressly, though not necessarily, adapted to facilitate the assembling of plates such as for example those usedin the construction of ship hulls, and the like, the construction being such as to promote maintenance of the adjacent edges ofcoacting plates in overlapping relation to aid in welding the platestogether. a Needless to say, I am awarethat manydifferent types of devices, tools and clamps, and certain types of jacks have been providedwith a view towardrendering convenient the assembling of flat and equivalent plates for expeditious welding purposes. With such information in mind, I have evolved and produced a specific construction which is industrially appropriate, expertly balanced and of great utility in aptly serving the intended purposes. It follows, therefore, that my primary aim is to generally improve upon known marketed and patented jacks and equivalent devices by providing one which is mechanically superior, compact and convenient, simple and reliable, and such as to save time. and labor in achieving new and useful results.

Furthermore, I have comprehendedthe problem and, through the wise choice and selection of appropriately usable elements, have provided a novel arrangement wherein coordination between the parts chosen is assured and capable of being relied upon.

Other features and advantages will become more readily apparent from the following description and the accompanying illustrative'drawings.

In the drawings, wherein like numerals are employed to designate like parts throughout the views:

Figure 1 is a top plan view of the jack and particular construction thereof, a devised in accordance with the principles of this invention, showing thesame in use in association with overlapping plates.

Figure 2 is an enlarged section taken vertically on the plane of the line 2-2 of Figure 1, looking in the direction of the arrows.

Figure 3 is an enlarged fragmentary view showing one of the slidable adapter fixtures for one of the jacking or feed screws.

Figure 4 is a sectionon the plane of the line 44 of Figure 3. s

Figure 5-is a fragmentary view showing the inner end construction of one of the jack screws,

illustrating the swiveled thrust head.

Figure 6 is a section, enlarged, on the plane of the line 6-6 of Figure l. V

Figure 7 i a, fragmentary perspective view the brackets H to the limbs Ill. Then, the feed showing one of the temporarily tack welded lugs employed in the arrangement.

The main or yoke-like unit is convenientlyreferred to as a portable, frame 8 It comprises a horizontal,- longitudinally elongated foundation ,bar 9, this having .right angularlydisposed limbs tion and strain equalizing purposes: As constructed and shown, they are especially efiicient in contributing their proportionate share to the general combination of parts. The limbs l0=also serve to carry the brackets H. Each bracket is p in the form of an arm having a reduced end portion I2 terminating in a T-shaped head. The head is formed into selectively usable, appropriately curved anchoring books 13 and I4.

Attention now comes to the slides or fixtures I I5. Generally, I have provided two of these, and they are in the form of parts l6 having clips I! which take over the longitudinal edges of the barv 9. Each fixture is provided with an adapter l8 of tubular form, the bore of which is provided with screw thread l9 to accommodate the jack or feed screw 20. The screw 20 has a suitable head 2| on its outer end toaccommodate the shiftable rod or handle 22. The opposite end of the screw is provided with a, thrust head 23 swivelly mounted in place as shown in Figure 5. Thus, we have a substantially U-shape-d frame with braces l0 bearing against the plates and shiftable adapter fixtures l5 carrying the thrust or feed screws,-these being parallel to each other and located between the limbs 10.

In'practice, lugs or ears 24 (see Fig. '7) are versible, that is, the limbs It) may be down against the .plate A, or the entire frame structure can be turned over through one-half revolution and thus serve to position the same limbs against the plate 3. However, the principle of operation is-the same regardless of whether the limbs are up or down. That is to say, the hook is are engaged in the lugs 24, as shown in Figure 2, to couple screws are backed out against the;plate B to bring the thrust heads 23 in position as shown. The feed, screws are slightly above'the brackets so as to enable the coacting brackets and. feed 7 These 7 which the invention relates will be able to ob tain a clear understanding of the inventionaiter considering the description in connection with the drawings. Therefore, a more lengthy description is regarded as unnecessary. i V r Minor changes in shape, size", and rearrange- 2. A plate assembling and retaining jack comprising a horizontal elongated bar having limbs rigid with and extending downwardly from opposite ends thereof, said limbs being curved downwardly and forwardly to bear against a plate at their lower ends, forwardly projecting brackets on the upper portions of said limbs having anchoring hooks at their forward ends for engagement with ears welded to said plate near its upper edge, fixtures carried by said par. near its. opposite ends, and jack screws threaded forwardly through said fixtures to bear at their forward ends upon the lower edge portion of a second plate overlapped upon the vupper edge portion of the firstnamed plate.

' 3. ,A plate assembling and retaining jack comprising a horizontal elongated bar having limbs men of details coming within the field of.iny ention claimed maybe resorted to in actual practice, if desired.

Ic I i p la structure of the class 'aescritea, m commanna a r rr ats h v ia n 'f overlapped, apertured lugs tackwelded on one of the plates adjacent theioverlapping portions, a U-shapediramehaving a central horizontal bar and longitudinally curved end limbsadapted to engage the firstenamedplate, brackets ca'rried'b'y said limbs and. having hooks releasably engageable with the lugs, slides on the central bar portion of the frame, and jack screws mounted in saidslides.

'tudinally of said bar.

rigid with and extending downwardly from oppositeends thereof, said limbs being curved downwardly and forwardly to bear against a plate at their lower ends, forwardly projecting brackets on the upper portions of said limbs having anchormg hooksat their forward ends for engagement with ears welded to said plate near its upper edge, fixtures carriedby said bar near its opposite ends, and jack screws threaded forwardly through said fixtures to 'lie iitr at 'their forward ends upo'ri the lower edge portion-of a second plate overlapped uponthe upperedgeportion of the first-named plate, said nseurs n' slidable on and longi- FERRUccIo MARTINI. 

